2009 Cadillac DTS Owner's Manual - Page 322

How to Inspect the Engine Air Cleaner/Filter To inspect the air cleaner/filter, remove the filter from the vehicle and lightly shake the filter to release loose dust and dirt. If the filter remains caked with dirt, a new filter is required. To inspect or replace the filter: 3. Remove the engine air cleaner/filter and any loose debris that may be found in the air cleaner base. 4. Inspect or replace the air filter element. To reinstall the cover: 1. Align the two hinges located on the inboard side of the cover. 2. Push the cover slightly down and towards the engine to engage the tabs in the hinges and align the two screws. 3. Tighten the two screws on the top of the engine air cleaner/filter cover. { CAUTION: Operating the engine with the air cleaner/filter off can cause you or others to be burned. The air cleaner not only cleans the air; it helps to stop flames if the engine backfires. If it is not there and the engine backfires, you could be burned. Do not drive with it off, and be careful working on the engine with the air cleaner/filter off. 1. Remove the two screws on the top of the engine air cleaner/filter cover. 2. Lift up the outboard side of the cover at an angle while pulling toward you. This is necessary due to the two hinges located on the inboard side of the cover. 5-18 Notice: If the air cleaner/filter is off, a backfire can cause a damaging engine fire. And, dirt can easily get into the engine, which will damage it. Always have the air cleaner/filter in place when you are driving.